31494479 has 2 divisors, whose sum is σ = 31494480. Its totient is φ = 31494478.

The previous prime is 31494469. The next prime is 31494497. The reversal of 31494479 is 97449413.

Together with next prime (31494497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31494479 - 2¹² = 31490383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31494439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15747239 + 15747240.

It is an arithmetic number, because the mean of its divisors is an integer number (15747240).

Almost surely, 2^31494479 is an apocalyptic number.

31494479 is a deficient number, since it is larger than the sum of its proper divisors (1).

31494479 is an equidigital number, since it uses as much as digits as its factorization.

31494479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 31494479 is about 5611.9942088352. The cubic root of 31494479 is about 315.7995276823.

The spelling of 31494479 in words is "thirty-one million, four hundred ninety-four thousand, four hundred seventy-nine".